ET MALWARE Onkods.A Downloader Checkin

Query · suricata

flow:established,to_server;
http.method;
content:"GET";
http.uri;
content:".exe"; fast_pattern; endswith;
pcre:"/^\/(?:[a-z]+\/)*?[a-z]+\.exe$/";
http.user_agent;
pcre:"/^(?=\d*[a-z])[a-z0-9]+$/";
http.header_names;
content:!"|0d 0a|Accept";
content:!"|0d 0a|Referer|0d 0a|";
content:"|0d 0a|User-Agent|0d 0a|Host|0d 0a 0d 0a|"; startswith;
Raw source ET MALWARE Onkods.A Downloader Checkin · Suricata
Esc
Published by Emerging Threats Open ↗, licensed under BSD 3-Clause ↗. Line breaks added for readability; the rule is otherwise unchanged. 
alert http $HOME_NET any -> $EXTERNAL_NET any (
    msg:"ET MALWARE Onkods.A Downloader Checkin";
    flow:established,to_server;
    http.method;
    content:"GET";
    http.uri;
    content:".exe"; fast_pattern; endswith;
    pcre:"/^\/(?:[a-z]+\/)*?[a-z]+\.exe$/";
    http.user_agent;
    pcre:"/^(?=\d*[a-z])[a-z0-9]+$/";
    http.header_names;
    content:!"|0d 0a|Accept";
    content:!"|0d 0a|Referer|0d 0a|";
    content:"|0d 0a|User-Agent|0d 0a|Host|0d 0a 0d 0a|"; startswith;
    reference:md5,fb570e6d68e708daeceae5dfc544fba2;
    classtype:command-and-control;
    sid:2018121; rev:8;
    metadata:created_at 2014_02_12, performance_impact Significant, signature_severity Major, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2024_04_08, reviewed_at 2024_03_11;
)

Detection rules belong to the projects that publish them and remain under their own licenses. This site indexes and links to them; it claims no rights in them.